Indexing plate for milling machines



E. R. LA CASSE INDEXING PLATE FDR MILLING MACHINES Filed May 9, 1921 1 NVEN TOR.

ATTORNEYS,

Patented July 10, 1923. f p

UNIT c ients want swam x0311 a sentimenta i 1 Application area m y 9,

To all whom it mom 1 I Be' it known that'I, EUGENE RAY Q D'LA CA'ssE,'a citizen of theUntited States and a" 'res ident'of Syracuse, inith e county'of Onon- 5 daga and State of New York g' have invented a certain new'and1isefu1 InQeX-ing Plate'for Milling Machines; of which the following is .aspecification; f I 'f This invention relates to indexing'cleyices of a "glili'erential index plate or deviceby which a 'maximum numher of adjustments on indexing of the work can' be' made with ratioof redaction b etvireen the index shaft; and the spindle; which indexing {lirice is" particularly. simple in construction and" operation and'highlyefiicient injuse, and the invention consists in the novel'featnres and in the combinations and constructions hereinaftef set forth and claiinedj In 1 desc 'ibing' this invention, reference 'is' had to the accompanying drawings in which like'characters designate corresponding parts I in all the-views.

this indexingdevice;

Brown & Shai'pe indexhead'proviclecl with Fi'giireB-is a detail .vieiv' o fithe kejwrench for turning the index plate.

This dexing' device .comprises-; a plate "'fo 'med with a circular series forholes, a"

atively 339 the pointenw and ifniean's for rde- 'term-ining the amount of shifting movement a of 'theplateffor the predetei'inined indexing movement. Y

. p 1 -;d ignates the plate whichis formed is' jonrnal'ed a shaft 6 connected "to the 'ingearing iIlClLldiII .spiial" gears onijthe s "ft for the spindles of milling machinesfand the" like, and has for its-"object the p rodncti'on I L p *on the sha'ft'to tiirniviithfsaidf'sh" the single] series of holes with any iven Figure 1 is "an elevation of'a conventional Figure 2 is a sectional View of the device.

with: a cii'cularisegies' of holes .2here shown as twenty-seven 'in number-, "the plate being mounted on the reduced1encl"3 ofahub 4" j oi bearing'on the indexingblock 5 in which i W1; ti eiairs- 46 9049? and spindle. ntefc'liange ahl f flof gears may be 'substantiatehanggthaigefa ratio as} will" be? iin deii'stood skilled in the" art lin} fiulhbe'r' 'df Holes mayibe used bill) twmy svn are nsedi-n filer toadapt the deviceto the standai clfirown & Sharpeindexhead. The 're c luctionigearing forms no pait of this jnventionfand'as the" construction and operation thereof is well v p known, further 'des'crip't'ip j? gg 6 unnecessary. 1

. 8 d signates the pointer which, is'lrnonnte l pointen'having snitable man g i gt d therewith f0! i n This meansis of" the',1is1ial cons fiction and includes'a' crank emanated on" e-e hd j (of the shaftifi in the usual ini fliiiie r and "lfajv ing the iisnal handle 10' 'wh1-ch' is outwardly relatiyely to the crank' an(lha$ a pin at'its inner end of enteringe'the hols' 2,

In the illi sti'a'te'cl ernbodiinent'fof ny in enti n the means for ng'rn'ially holding the plate 1 from'movelnent'ahoiit'its axis comprises a plate "11n'1'o1'intedbn the fecl iced end 3'pf; the "hub or hearing 4 and se'c u'i ed to the hub by screws 12 extendin zthi'oligh the plate 11 and 'threaidinginto 'tlie lai'l'ger portion, the plate 11 having ac'ireulat e'cessi 8.0 on its frontside-inWhich'the"plate l is f tioned, and clamping means as screyvsligy 'pl'ate 11 "threading into the inarg'iniofvt J and pressing' against wa'sher 's 4 'vqerl'yi ng.

the margin of the plate 11 The means'fordeterrniningthe a shifting 'm'ovelnent of the plate 1 i in ord'e ftqg 7 change'the position of "the holes; 2 ielae iy" to the pioneer or to thepiniofthehan e10 i v (comprises coacting'f'scales on the plate' fll,

adjacentthe inar'gin'of the plate and the mar in of such plate 1; I" 15 flesignates a scale-gr duat d in degrees andv minutes on themafgin'o f thejplate iil and ;16 is a single g'i'adiiation ki 'on the' 'plate 1. 2" j To facilitate the turning 0:211:11 a; 1%

60, Then, to obtain for example, a spacing or periphery for coacting with a wrench key 1118, Fig. 3, for entering holes 19 in the plate In operation, for a predetermined indexing of the spindle 6 the handle 10 is moved outwardly to disengage the pin from one of the holes 2 and the crank 9 turned to turn the shaft 6 andthe pointer 8 a predetermined number of holes as for instance nine holes, and then any predetermined fractional distance between the" holes" is determined by loosening the screws 13 and rotating the plate 1 about its axis say for instance 7, and then again rotating the pointer by means of the handle to bring the pin in line with the next hole so that the indexing will be nine holes plus 7. Instead of shifting the plate 1 in an ad- Vance direction, it may be moved backwardly 3 as determined by the scales 15, 16. For

each indexing this operation isrepeated.

Therefore by this indexing device an indefinite number of indexing can be effected with a single series of holes.

' If desired, the scale 15 may extend through a circle of 360. and the plate 1 maybe notched throughout its entire periphery but this IS unnecessary as the indexing can be accomplished by adding on the additional number of degrees to the number of holes over which the handle 10 is moved and when the line 16 of the plate 1 reaches the end of the scale the plate 1 can then be rotated in the reverse direction and the amount of spacing determined by subtracting the amountv previously added from the next number on the scale 1 1, that is, the scaleis graduated in divisions of 10 and in the first operation, the additional number is added on and in the second operation the number is substractect from 10.

In a Brown & Sharpe index head the index spacing number is forty that is, forty revolutions-v of the index crank are required to make one'complete'revolution of the index spindle. In my index plate there are twenty-sevenholes to conform to the Brown & Sharpe index system. For other systems a different number of holes would be neces: sary. 1

indexing of 3 7' on the work rotatable with the spindle, move the crank 9, nine holes: on the plate 1, then loosen the screws 13 and insert the wrench head 18 to mesh with the teeth-l7 of the plate 1; withdraw. the Pi 9 Movement of the pointer 8 one hole equals comprise a shaft connected to the indexing 1 spindlethrough suitable reducing gearing, the dpvice'ineluding inner and outer concentric index-plates mounted concentric with the shaft, the inner plate having a circular series of equally spaced holes and a pointer mounted on the shaft to turn therewith and movable over the inner plate, and having means associated therewith for entering any one of the holes, the outer plate being fixed from movement and the inner plate being normally fixed from movement about its axis and being shiftable about its axis to change the position of the holes relatively to the pointer, means for determining the amount of such shifting movement to position one of the holes for a predetermined indexing and means for normally locking the inner plate from shifting movement, substantially as and for the purpose specified. i r 2. An indexing device for indexing heads of milling machines and the like which heads able over the inner plate and having means associated therewith for entering, any one of the holes, the outer plate being fixed from movement about its axis and being shiftable about its axis to change the position of-the holes relatively to the pointer, coacting scales 7 provided onithe inner and outer plates for determining the" amount of such shifting movement to position one of the holes for predetermined indexing, and means for normally locking the inner plate from shifting movement, substantially as and forthe purpose set forth.

3. An indexing device for the index ng heads of milling machines and the like wh ch heads comprise a shaft connected to the 1n" dexing spindle through suitable reduclng gearing, the device including inner and outer concentric index plates mountedconcentrio with the shaft, the inner plate having a circular series of equally spaced holes, and a pointer mounted on the shaft and movable 'over the inner plate and having means ilssomovement and the inner plate being normally fixed from movement about its axis and being shiftable about its axis'to change for the purpose described. the position of the holes relatively to the In testimony whereof, I have hereunto 5 pointer, coaoting scales provided on the insigned my name, at Syracuse, in the county ner and outer plates for determining the of Onondaga, and State of NeW York, this amount of such shifting movement to posi- 24th dtaj'y of April, 1921.

dexing, and means for locking the Y inner plate to the outer, plate, substantially as and 1 tion one of the holes for predetermined in- E GENE RAYMOND LA CASSE.

Certificate of Correction.

It is hereby certified that in Letters Patent No. 1,461,316, granted July 10, 1923, upon the application of uugene Raymond La Casse, of Syracuse, New York, for an improvement in Indexing Plates for Milling Machines, errors appear in the printed specification requiring correction as follows: Page 1, line 34, for the Word or read of; line 71, for the word of read for, and line 89, for the Word pioneer read pointer; and that the said Letters Patent should be read with these corrections therein that the same may conform to the record of the case in the Patent Ofiice.

Signed and sealed this 14th day of August, A. D., 1923.

[SEAL] KARL FEN N IN G,

v Acting Commissioner of Patents. 

